/*
 * Copyright 2017 Huawei Technologies Co., Ltd
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.servicecomb.foundation.common.http;

import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

import javax.ws.rs.core.Response.Status;
import javax.ws.rs.core.Response.StatusType;

import io.servicecomb.foundation.common.utils.SPIServiceUtils;

public class HttpStatusManager {
  private Map<Integer, StatusType> statusMap = new ConcurrentHashMap<>();

  public HttpStatusManager() {
    for (Status status : Status.values()) {
      statusMap.put(status.getStatusCode(), status);
    }

    SPIServiceUtils.getAllService(StatusType.class).forEach(status -> {
      addStatusType(status);
    });
  }

  public void addStatusType(StatusType status) {
    if (statusMap.containsKey(status.getStatusCode())) {
      throw new IllegalStateException("repeated status code: " + status.getStatusCode());
    }

    statusMap.put(status.getStatusCode(), status);
  }

  public StatusType getOrCreateByStatusCode(int code) {
    StatusType statusType = statusMap.get(code);
    if (statusType != null) {
      return statusType;
    }

    statusType = new HttpStatus(code, "");
    addStatusType(statusType);

    return statusType;
  }
}
